PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/20-18:42:50
G02     353.9          75.9               13.2 +/-    0.80      13.6 +/-    0.80  0.120 / 0.230
G05     166.2          36.4               18.4 +/-    2.09      28.5 +/-    2.09  0.130 / 0.310
G06     43.6           34.8               10.5 +/-    0.47      16.6 +/-    0.47  0.030 / 0.040
G12     294.3          77.2               12.1 +/-    1.24      12.3 +/-    1.24  0.030 / 0.040
G19     82.0           21.9               10.0 +/-    2.07      21.0 +/-    2.07  0.050 / 0.100
G24     225.3          19.0               17.2 +/-    2.45      38.7 +/-    2.45  0.050 / 0.070
G25     314.9          38.9               15.4 +/-    1.69      22.8 +/-    1.69  0.060 / 0.090
G29     291.8          14.5               12.4 +/-    1.60      31.2 +/-    1.60  0.040 / 0.070